I have a 300 WM that I hunt with. I shot 5 deer last year. All the deer were shot in the heart. Meaning that every deer had a partial or completely destroyed heart. The ranges were between 40 and 252 yards.
It was kind of a goal for me to hit all the animals right in the heart because my rifle was shooting 1/4" - 3/8" groups. Just something to prove I guess.
Well generally speaking I lost half a deer in total out of the five taken due to meat loss. Now I'm going back to shooting them way back. That is how I started off with this rifle. Just take out the back of the lungs. It has never failed to put the deer down inside of 25 yards.
Tom